The deduction that a donor is allowed to claim in one year for gifts "for the use of" a public charity or to a private foundation is limited by the donor's adjusted gross income (AGI). The deduction is limited to 20% of the donor's AGI for a gift of appreciated property. The deduction is limited to 30% of the donor's AGI for a gift of cash. The donor may carry forward excess deductions of this type for up to an additional five years.
In the context of planned giving, transfers to a grantor lead trust are subject to these limitations. Other planned gifts that earn an income tax deduction are generally subject to 30%/50% limitations.